Symbol and connections
These blocks can be programmed to your liking. On the top side connections all inputs can be connected, on the bottom sides, all the outputs can be connected. The coding languange that is compatible with the programable controlers is Javascript. However, Hysopt evaluates the writen code in these programmable controllers every simulation step. This results that not all off the functionalities of Javascript are possible to be implemented. For instance:
While and with statements.
String inputs or outputs
….
There are 3 options:
Controller with 8 in/outputs
Controller with 16 in/outputs
Controller with 32 in/outputs
Writing code
Controller syntax
In these controllers, code can be written to translate certain controls.
this can include things like:
assignment statements
if and if-else statements
switch statements
comments : single line (//) and multiline (/*...*/)
operators :
increment operators (++ and --)
unary operators (- and !)
binary operators : power (^), multiply (*), modulo (%), divide (/), sum (+), min (-)
ternary operator (a = x ? b : x) see https://www.freecodecamp.org/news/c-ternary-operator/
conditional operators (|| and &&)
comparison (<=', >=, >, <, ==, '!=)
mathematical functions : exp, ln, sin, cos, sqrt, min(x1, x2), max(x1, x2)
Initialisation
When using a variable that has not been defined before, the controller will equal the new variable to 0. This functionality can be used for initialisation purposes with the following topology:
Built-in simulation variables
The following built-in variables can be used in the code withour prior assignment in the programmeable controller:
time : the time variable of the simulation
timestep: the timestep of the simulation
Example code
here is an example with code : example.txt
Note that the inspiration library is filled with written code like this, so be sure to look here for inspiration.